Thousands of foreign drivers have been speeding on our roads unpunished because their cars are not UK registered.
There have been 3,580 oversees speeding offences across the Thames Valley since January last year with one driver clocking 102mph in a 70mph zone.
But because of the legal loophole, police are unable to slap drivers with tickets if vehicles are not registered with the DVLA.
There were 447 speeding offences in Northants and the highest speed recorded was 84mph on the 70mph A45 Great Billing Way dual carriageway.
Figures have been released by the Institute of Advanced Motorists to reveal 23,295 speeding offences in England and Wales have gone unpunished.
The number of offences is equivalent to £2.3 million worth of speeding tickets.
The institute’s director of policy and research Neil Greig said: “The high numbers of oversees speeders on our roads show how important it is that the UK joins up with the rest of Europe to harmonise motoring offences and give the police extra powers to pursue dangerous drivers.
“Progress on this issue has been very slow and in the meantime thousands of drivers are avoiding fines and bans simply because their cars cannot be easily traced.”